Re: Telephone interface

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Article #11064

#11064

From: John Schuch
Date: Fri, 02 Oct 1992 13:00

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In article <1agi51INNc58@usenet.INS.CWRU.Edu> at847@cleveland.Freenet.Edu (Jeff Hunsinger) writes:
>
>This has got to be an FAQ, but I just read about 100 subject lines
>and didn't find it. I am trying to hook up a DTMF decoder (SSI202)
>and a voice synthesizer (amplified with an LM386) to a telephone line.
>The DTMF decoder works fine so long as I don't hook up the amp.
>Here's my current set-up:
>----Cap--- 600:600 ohm matching transformer-> amp -> ssi-202
>                                           <- Amp -< voice synth.

Possibly I don't understand what your doing but what is the purpose
of the amplifier in line with the SSI202? The 202 should work fine
just capacitivly connected to the 'safe' side of your isolation
transformer. Maybe a more detailed ASCII-schematic (ASCIImatic ? :-)
would make it clearer.

John

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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!uwm.edu!cs.utexas.edu!asuvax!ennews!mcdphx!hbg6
From: hbg6@phx.mcd.mot.com (John Schuch)
Newsgroups: sci.electronics
Subject: Re: Telephone interface
Message-ID: <1992Oct2.130056.17508@phx.mcd.mot.com>
Date: 2 Oct 92 13:00:56 GMT
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